Alternate Planets, Suns, Stars, and Solar Systems Thread

It's true; an Mars-size planet hit the early Earth and formed the Moon; however, if it were changed, say twice as large or more of the material was ejected into space to form the Moon, things will be different on Earth.

1. Most scenarios, the Mars-like Moon would not have a magnetic-field due to not having a solid metal-core; That metallic-core sank into the Earth when the impact that formed the Moon occurred.
2. Earth's gravity may be stronger due to a larger impact.
3. Spin would be faster. Days would be shorter even today.
4. Tides of a Mars-sized Moon would be greater than today; I want to say twice as great, but I don't know the exact math.
5. Mars-like Moon, being closer and without a magnetic-field would have more solar-wind striking it's atmosphere. However, there might be tidal-forces squeezing gasses out of the Mars-like Moon so the atmosphere may be thicker.
6. As it stands right now, Mars is capable of having running, liquid-water due to just the right temperature, air-pressure and salinity of the water. (Mar's water is extra, extra full of salts).
7. Mars-Like Moon will be eventually tidally-locked; probably not as early on has the Moon.
8. Mars-like Moon will probably have microbial-life and it's presence would certainly effect how life evolves on Earth; we probably wouldn't be here.
 
Interesting map that I came across when I googled. The basis is the Earth, but the poles have been changed. Obviously, in reality this would have changed evolution a lot, so the discussion of the development of civilizations assume that a species comparable to humans still would develop. http://www.worlddreambank.org/J/JAREDIA.HTM

Edit: And here are some more: http://www.worlddreambank.org/S/SHIVERIA.HTM
http://www.worlddreambank.org/S/SEAPOLE.HTM
http://www.worlddreambank.org/T/TURNOVIA.HTM
 
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Interesting map that I came across when I googled. The basis is the Earth, but the poles have been changed. Obviously, in reality this would have changed evolution a lot, so the discussion of the development of civilizations assume that a species comparable to humans still would develop. http://www.worlddreambank.org/J/JAREDIA.HTM

Edit: And here are some more: http://www.worlddreambank.org/S/SHIVERIA.HTM
http://www.worlddreambank.org/S/SEAPOLE.HTM
http://www.worlddreambank.org/T/TURNOVIA.HTM
This is a classic. You need to know this.
https://www.alternatehistory.com/forum/threads/planetocopia-map-thread.368765/
There are several timelines about these worlds in AH.com
 
But probably later development of civilizations for the reasons that Jared Diamond mentioned.
Well, that depends on if he's right! With a sample size of one, and for the matter one with a built-in discrepancy between the two comparably-sized areas....
 
Do you know any internet site where you can pick a point on the map and choose it as one of the poles and then see the world with latitudes and longitudes?
There's a program for it that you can download here, though I don't think it shows coordinate lines. For that, you should be able to import the new map into G.Projector.
 
Here is my alternate solar system.

1:

Vulcan and Hephaestus.

Between 1866 and 1878 no reliable observations of the hypothetical planet Vulcan were made. The astronomers Watson and Swift had reputations as excellent observers. Watson had already discovered more than twenty asteroids, while Swift had several comets named after him. described the colour of their hypothetical intra-mercurial planet as "red". Watson reported that it had a definite disk—unlike stars, which appear in telescopes as mere points of light—and that its phase indicated that it was approaching superior conjunction.

Both Watson and Swift had actually observed two objects they believed were not known stars. These 2 objects were later proven to be the small planets of Vulcan, and Hephaestus. Their orbits are similar but due to inclinations and resonances their orbits never cross. They are likely to be larger than the planet Pluto but smaller than our Moon.

2:

The 3 small moons of Mercury.

Mercury has 3 very small moons orbiting quite close to it. They are less than a mile wide and were discovered whenever the first space craft did a fly by of Mercury.

3:

The planet Neith.

In 1672, Giovanni Cassini found a small object close to Venus. He did not take great note of his observation, but when he saw it again in 1686, he made a formal announcement of a possible moon of Venus. The object was seen by many other astronomers over a large period of time: by James Short in 1740, by Andreas Mayer in 1759, by Joseph Louis Lagrange in 1761, another eighteen observations in 1761, including one in which a small spot was seen following Venus while the planet was in a transit across the Sun, eight observations in 1764, and by Christian Horrebow in 1768. Cassini originally observed Neith to be one-fourth the diameter of Venus. It was first thought to be a moon of Venus, and was noted to be extremely dark in coloration.

In 1884, Jean-Charles Houzeau, the former director of the Royal Observatory of Brussels suggested that the "moon" was actually a planet which orbited the Sun every 283 days in a resonance with the planet Venus. It would be in conjunction with Venus every 1080 days, which fit with the recorded observations. It was about the size of our moon though it's surface was incredibly dark, almost black, meaning it is rarely seen and never been able to be seen with the naked eye.

In the late 60ss, one of the Mariner Probes sent by the Confederacy spotted a small asteroidal moon of Neith. Orbiting every 5 days and around 20 miles wide.

4:

The Rings/moons of Venus.

Venus had always had a strange shape whenever it eclipsed the sun. People would think that it would have large bumps or 'ears' on either side of it. This was found out to not be the case. I'd say the rings would be discovered by Cassini's time. The rings are made out of an asteroid or small moon that got too close to Venus. Discovered by Gaileo in the 1600's. In the late 1800's, 4 small moons of Venus were discovered. They were smaller than 10 miles in size and space out relatively even from the rings of Venus. The popular theory is that the 5th moon got too close and got ripped up into the rings around Venus.


5:

The other moon of the planet Earth. I'd say this one is a bit more out there, and I am also going to say that the Mass of the Moon is changed or slightly altered to allow the existence of this second moon, without perturbations occurring. Because of its relatively small size of 430 miles and its distance, it doesn't effect the tides in any noticeable manner.

In 1898 Hamburg scientist Dr. Georg Waltemath announced that he had located a system of tiny moons orbiting Earth. He had begun his search for secondary moons based on the hypothesis that something was gravitationally affecting the Moon's orbit.

Waltemath described one of the proposed moons as being 1,030,000 km (640,000 mi) from Earth, with a diameter of 700 km (430 mi), a 119-day orbital period, and a 177-day synodic period. He also said it did not reflect enough sunlight to be observed without a telescope, unless viewed and made several predictions of its next appearances.

E. Stone Wiggins, a Canadian weather expert, ascribed the cold spring of 1907 to the effect of a second moon, which he said he had first seen in 1882 and had publicized the find in 1884 in the New-York Tribune when he put it forward as probable cause of an anomalous solar eclipse of May of that year. He said it was also probably the "green crescent moon" seen in New Zealand and later in North America in 1886, for periods of less than a half-hour each time. He said this was the "second moon" seen by Waltemath in 1898. Wiggins hypothesized that the second moon had a high carbon atmosphere but could be seen occasionally by its reflected light.

After more predictions came true, the second moon was discovered and named Lilith. It was later discovered to be an extremely dark moon, with dark brown to black colorations. It had frequent outgassings which created a very thin, green atmosphere. It is said to be a very pourus moon with large interior spaces in which exotic gasses collect and outgass from cracks and holes in it's surface. It's a very light moon.

6:

The Rings of Mars were discovered before that of Saturn and lead to an earlier realization of what planetary rings were. They were created by an old Moon of Mars (Phobos) that got ripped apart by Mars's gravity a few million years ago. Mars has one moon, Deimos. They look something like this.

6.5 Ceres is a little bit larger and has a small ring system.

7:

The 5th large moon of Jupiter. When the moons of Jupiter were discovered it was discovered that there was a 5th large moon. This moon is slightly larger than Ganymede and orbits further out than the other moons. It has a thin wispy atmosphere.

8:

The hypothetical moon of Themis, around Saturn exists. en.wikipedia.org/wiki/Themis_(…

9:

The small object known as Chiron here is about the size of Pluto. It has a few small moons and was likely discovered around the same time as in our timeline.

10:

Neptune has more visible rings, and Neried is about the same size as Triton. Was kicked into a higher orbit when Triton was captured. Neptune and the Kuiper belt are a bit further out to make way for an asteroid belt between Uranus and Neptune. There are a few small planetoids there.

11:

A planet just beyond the Kuiper belt of these descriptions. Likely orbits further than 50 AU out. It's name is Amman.

" In 2017, Malhotra and Kat Volk argued that an unexpected variance in inclination for KBOs farther than the cliff at 50 AU provided evidence of a possible Mars-sized planet, possibly up to 2.4 M"

12:

The supposed planet '9' exists and is found to exist in 2018 in this world.

13:

The planet Tyche exists with assorted moons. It's a brown dwarf actually.

Neith and Lilith (the other moon of the earth) are almost black.

Uranus and Neptune have more extensive ring systems.

Vulcan and Hephaestus are molten on the day side, while on the back side they are frozen over with a sea of liquid nitrogen on their backsides.


Amman orbits at the edge of the Kuiper belt, I'd say 50-60 AU. Accordino has planet 9's orbit, while Tyche orbits at 1,000 AU away.

The 5th moon of Jupiter is named Ezar. It has a pinka pinkish-tan surface, thin wispy clouds and pink-blue skies.

Planet ten is named Amman, it's fairly white. It has a thin ring system and a single large moon named Gaupelt. Gaupelt is white with tan areas. It's about the size of Mars. All of these planets have a red tint / coloration caused by the red glow of Tyche.

Planet 9 is named Accordino is colored similar to Neptune but is darker and more purplish. It has 3 moons. The first is named Ashly, more of a black-grey color. The 2nd is named Tennant, kinda yellow with black areas. The 3rd is named Hayes which is more of white-blue color. They are all around, fairly small about the size of pluto.

Tyche is a brown dwarf star. It has 7 planets.

Krause is the first planet. It's about pluto mass, very Mercury like. It's actually a light tan-grey color but appears more red because of the glow from Tyche.

Sarru is the second planet. It's about 5 times the mass of our Earth, and has the appearance of an ice giant similar to Neptune, but still within the red glow of Tyche.

Schluter is the 3rd planet. It has a single small sea of water, thin atmoshpere. Slightly smaller than mars, more of a desert color. Within the red glow of Tyche.

Kincaid is the 4th planet. Very Mars like in color.

Hatem is the 5th planet, it is very much like our moon and in size.

Manning is the 6th planet. It is fairly large at around 1.5x the mass of our Earth. It is Earthlike and has life. Unlike what you may think it is in a 2:3 resonance with it's orbit. Meaning it rotates twice for every 3 times it orbits around Tyche. It has 2 asteroidal moons named Hanna (31 miles in size) and Calianna (67 miles in size) both of them are grey.

The 7th planet is named Lazore, is more of a turqioise - dark blue color. It's the largest planet in the system at around 17 earth masses and orbits quite far away from tyche. It has some rounded moons.
 
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What if Pluto was too big to be considered a Planet?
https://i.redd.it/9diveeujdy251.png


Far beyond the orbit of Neptune, there lies a massive plethora of icy bodies and rocks in a region known as the Kuiper belt, but there is one lord that rules the dark depths of the solar system. Only appearing visible for once every six hundred years, the massive body named Pluto was formally discovered in 1930 by Clyde Tombaugh, although it is likely that earlier astronomers have cataloged it when it was visible. Pluto was theorized to be the source of the disturbances that caused the orbital anomalies with Neptune and perhaps Uranus, so it was hunted for many times earlier.

Taking a closer look, it seemed like Pluto was no ordinary object. The world, or star, is a gargantuan hulk, having 20 times the mass of Jupiter, the next largest planet in the solar system. Astronomers in 2005 have declassified Pluto as a planet (stirring up quite a bit of controversy) and instead created a new term which it fits, a ‘Hadal’ (OTL Brown Dwarf). Hadals are somewhat crossed between planets and stars, and they are theorized to have undergone stellar fusion once in their lives. The Hadal has a highly eccentric orbit around the sun, coming 97 AU at Perihelion and going as far as 722 AU at Aphelion. The New Horizons orbiter visited Pluto in the year 2025, when the Hadal was near Perihelion, allowing for quick access. Pluto is magenta in color, and appears to be somewhat of a cross between a planet and a star, as Hadals are. Unlike planets, Pluto generates heat at its surface, reaching temperatures of up to 1700 degrees Celsius. Indeed, it warms up some of the planets in what could be called its own mini solar system. The object is slightly larger than Jupiter, at 152,832 km, although it is much more dense and massive.

The closest body to Pluto is the planet Cerberus, a huge body between the size of Mars and Venus at around 8,340 km in diameter. Cerberus is tidally locked to Pluto, and it even possesses a very thin mars-like atmosphere on one side heated by the world it orbits. The atmosphere is made of Nitrogen, and it’s surface is composed of water ice on the side. As you travel further from the atmosphere, the terrain becomes more rugged and the nitrogen fuses to the ice. There is also a large concentration of Tholins on this side.

Proserpina is the second world in Pluto’s little solar system. It is similar to Titan, albeit a little larger and with much more methane oceans. The object is 5,293 km in diameter, and is covered in a thick layer of nitrogen and methane gas, trapping a decent amount of heat inside which warms the planet up to higher temperatures than the other Plutonian satellites and with a pressure of 23 bars. The world is similar to Titan, except it is 75% covered with seas of liquid nitrogen.

The third and fourth moons from Pluto are Vidus and Larenta, each roughly the size of Earth’s own moon. Vidus is mainly composed of rocky ice and Larenta is half covered in tholins, which are sprinkled throughout the moon, giving it a spotty appearance. Both of these moons are home to fairly large amounts of cryovolcanoes. Between the two smaller worlds and the next major body is the Styx belt, which is similar to the Asteroid belt around the sun, albeit a lot more icer. There are not many big bodies in the Styx belt, and the largest asteroid is only 200 km across.

The fifth major body from Pluto is the largest one, the ice giant Charon. Charon is a little smaller than Neptune and Uranus, at 43,754 km in diameter. The world is a dull indigo, and is home to large concentrations of fusion fuels. Charon is orbited by 23 moons, with three major ones being Hamlet (430 km), Othello (2,376 km) and Macbeth (1,212 km). These moons were of course named after Shakespearean characters, similar to Uranus’s moons.

(Sidenote: As I am a lazy ass, I decided to go reuse some old models of planets I made earlier, which is why if you can’t tell already, Othello and Macbeth are actually OTL Pluto and Charon. Charon just captured them at some point, similar to what happened with Triton for Neptune. I also felt like I had to keep the old Pluto alive, so here he is)

Beyond Charon’s orbit, there lies the Acheron belt, which is Pluto’s rough analog to the Kuiper belt. This sphere extends from 0.5 AU to 5 AU from Pluto, and it is home to many small icy bodies. The largest three of these are Clotho, Lachesis, and Atropos, which are each between 1,000 and 2,000 km across, similar to the main Uranian moons. The Acheron belt is also home to many comets which whizz into Pluto’s inner satellites.

The last major body of Pluto’s mini solar system is the world of Orpheus, at the very edge of Pluto’s hill sphere. Orpheus is actually quite massive, being the size of Venus, and it orbits Pluto at an eccentric 100 year period, which can take it as far as 30 AU away from the Hadal. The world is similar to Europa, and has a very massive subsurface ocean with quite a bit of tidal activity generated from its Mars sized moon/binary companion, Eurydice. But, below the ice, there lies a massive secret.

The Pluto system was first reached by humans in the year 2144, when a joint mission by the Indonesian and Filipino space exploration teams landed on the Charonian moon of Othello, followed by further missions to the Styx belt, the Acheron belt, Larenta, Vidus, Proserpina and Cerberus. Not much really came out of these missions, aside from being a simple mission about exploration and bragging rights. Pluto was not colonised until the 23rd century, which was done by Africans, Selenites, Martians and Neptunians, when the first city of Oko was established on Proserpina.

Things forever changed in the year 2235, when a drill penetrated the dense layer of ice on Orpheus and uncovered something astonishing. There were what seemed to be artificial structures under the ice, and a discovery of a sentient coral like lifeforms with a large hive mind like intelligence. More of these coral lifeforms were discovered under the planet, and communication was established to them by the citizens of New Tycho on the surface. These life forms were named the Orphi, and they seemed to be ancient, having first developed sentience up to 100 million years ago, although they seem to lack any technology whatsoever. The Orphi haven't really moved on from their primitive ways, but a couple hundred minds have settled into sharing a world with the humans and their creations, and some have even migrated to the inner solar system.
Plutonian civilization today is geared towards interstellar colonization, and they are the main port of exit toward the stars. Charon and its moons have the largest shipbuilding industries in the solar system, with massive arkships being towed and fueled in its orbits, while colonial societies enjoy waiting on the casinos and hotel cities of Vidus, which is supplied with Larenta’s massive agricultural industries, all of which is regulated by the supercomputing stock markets and industries of Proserpina. Cerberus is currently in the process of terraforming, which is planned to be done by the crazy idea of plunging it near Pluto to warm up and blasting it with Proserpini nitrogen. Pluto and its satellites are now a bustling metropolis in the void, a civilization in the depths of the hell that is wild space.
 
I had a friend here make my alternate solar system.
A well done image. Your system is... fascinating. Utterly unstable, but fascinating. Counter-Earth is impossible conceptually, but a body at L5? Maybe. Maybe not on astronomical timeframes, but for a while. The Romans may have named it Sectator (follower, attendant) for its behavior relative to Earth. I’m also not sure Neith or Basile is stable. Resonance with Venus/Earth (and Saturn/Uranus) would probably throw them around. With more information about the masses, sizes, and semimajor axes of these bodies, it might be fun to throw them into Universe Simulator to see how long the system stays stable, if at all.
 
A well done image. Your system is... fascinating. Utterly unstable, but fascinating. Counter-Earth is impossible conceptually, but a body at L5? Maybe. Maybe not on astronomical timeframes, but for a while. The Romans may have named it Sectator (follower, attendant) for its behavior relative to Earth. I’m also not sure Neith or Basile is stable. Resonance with Venus/Earth (and Saturn/Uranus) would probably throw them around. With more information about the masses, sizes, and semimajor axes of these bodies, it might be fun to throw them into Universe Simulator to see how long the system stays stable, if at all.
Counter-Earth's orbit is symettrical with the Earth's orbit. With the fluke of a chance of it staying behind the sun.

" To remain hidden from Earth, the Counter-Earth would require an orbit symmetrical to Earth's, not sharing the second focus or orbit path."

Basile has the same orbit as the minor planet Chiron in our solar system. It's the size of Titan. It replaces Chiron. https://en.wikipedia.org/wiki/2060_Chiron

1591334215486.png


While Neith is about Lunar mass, orbiting every 283 days.

Amman is at around 150 AU, twice the mass of our Earth, it's moon is Mars mass.

Accordino orbits at around 300 AU in a circular orbit.

Feel free to suggest ways they might be in more stable areas, and what you think of the other bodies.
 
Cool as F, just how many planets and moons on the system are habitable (I think I counted 4 or 5, but I'm not sure) and just how massive are the plantes after the Kuiper Belt?
Manning, Counter earth, and Nibiru are. Roughly.

Accordino is14x the mass of Earth. Amman is 2x the mass of Earth. Wormwood, Tyche, and Nemesis are brown dwarfs, though Wormwood and Nemesis are Y dwarfs or sub brown dwarfs.
 
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Just going to give more of an overview of these planets / bodies.

Hephaestus is slightly smaller than that of our moon. On the sun facing side it has a sea of molten rock and other materials. Only along the terminator zone it beings to solidfy. On the back side it is frozen. With seas of liquid nitrogen, and then as you get further onto the anti-solar point there is Nitrogen snow. Orbits every 11 days. Hephaestus is more dense than Vulcan.

Vulcan is slightly smaller than Mercury. It is very much the same as Hephaestus but since it's larger it has a more expansive lava ocean on it's front side that is slightly more pronounced. The back side is the same as Hephaestus basically. Orbits every 36 days.

Both of these planets orbit within the Vulcanoid belt, an asteroid belt of rather small asteroids measuring in size from 10 miles to less. They are made up of debris from both planets that has been blased off from asteroid impacts and collisions in the past. Because Vulcan and Hephastus are closer to the sun than Mercury, their hill spheres are extremely small so they can't clear their orbits, and the same reason their existence doesn't really affect the other planets. On the night side of these planets you can get a spectacular view of Mercury, Earth, Counter-Earth, Venus, and the other planets. Both of them have no axial tilt, basically at 0.

Mercury's moons are at most, 3 miles wide. They are extremely small and orbit much like the Moons of Mars in our timeline. There is not much to note about them as they are basically hunks of rock captured into orbit around Mercury.

Venus has 4 asteroidal moons. The first one is 3 miles in size, the second is 14 miles in size, the third is 49 miles in size, and the last is 21 miles in size. Venus has rings because there was once a 5th inner moon that got too close to Venus and got ripped up into its rings. Because of Venus's thick atmosphere the rings that were once close in have largely degraded. Venus keeps it's retrograde rotation.

Neith is slightly smaller than our moon. It's surface is almost black. Though a few craters are bright white, revealing that underneath its black surface is a layer of white-light grey regoltih. Because of its darkness it wasn't discovered until the invention of the telescopes and is rarely able to be observed, if ever. It has a single 30 mile wide asteroidal moon that orbits at a medium distance away, but fairly close. It has spectacular views of Earth, Venus, and Counter-Earth. It orbits every 283 days. Alternatively it might work better as a Venus trojan. Neith rotates every 11 days, and is on it's side much like Uranus, at 101 degrees of axial tilt.

Counter-Earth is very much like our Earth. It has a planet wide ocean with a few islands. The only large landmass is at it's Northpole, a super continent. It's atmosphere is slightly thicker than Earth's at around 1.1 Atmospheres. It's oceans have algae that have seasonal blooms that cover the entire oceans a purple color when they 'bloom' if that makes sense. It has a slightly higher content of halogens in its atmosphere which makes it's skies look different than Earths that change colors slightly throughout the day due to angles of sunlight. It's moon of Delaney appears the size of our moon but is less Dense. One side of it is dark grey much like Neith's, the other side is white. This makes it appear much like a Half moon despite being a full moon, as you can see both 'sides' of it that are due to an orientation. The 2 smaller moons are Shepard moons within the rings of Counter-Earth. These rings are fairly recent and won't last much longer due to Delaney's influence. Delaney and Counter-Earth have 19 degrees axial tilt, making the rings on the same orbital plane as Delaney and Counter-Earth's orbit around its barycenter.

Lilith is a small 430 mile wide moon orbiting further out than our moon. It's surface is quite dark so it is unable to be observed and you need a telescope to see it's affects on blocking out certain stars. It is a porous moon with gases kept within it's 'pores' that sometimes leak out and create a green atmosphere around it.

Mars is the same as OTL, but with more polar ice. It'd make it look more like Duna from KSP, and has rings due to an earlier Phobos entering the roche limit.




Ceres, Pallas, Hygeia and Vesta are all gravitationally rounded but still quite small.

Jupiter mas more 'red spots' than OTL. It's rings are noticeably more pronounced but due to it's lack of an axial tilt they are viewed edge on from Earth and not noticed. It has an extra large moon named Ezar. Ezar is the size of Ganymede and has a thin atmosphere with clouds. Lissona is the next large moon about the size of Pluto that orbits with the irregular moons of Jupiter in a retrograde orbit. It's a captured planet and has a more of a white-grey surface but largely made of ice for its crust.

Saturn has a noticeable 'great white spot' which has been there for who knows how long. It is the same besides that. It's additional moons are where things are different. Themis is a 60 mile wide asteroid that orbits between Titan and Iapetus. Galarneau is a very interesting moon. It's about the mass of Mars orbiting much. It likely takes around 200-300 days to orbit around Saturn and is in a slightly elliptical orbit. It has Methane seas like Titan, and is basically a larger version of Titan. Unlike Titan however, it is host to exotic life and it's atmosphere doesn't completely obscure the surface. It rotates very slowly and is in a 2:4 resonance. For every 2 times it orbits, it rotates 4 times. It has a magnetic field and aurora. Davis is the next moon further out, probably taking 2 to 3 years to orbit around Saturn. It orbits beyond the Phoebe ring, is Pluto mass and has a pinkish-purple color. It rotates every 8 days and has occasional outgassing. It has a subsurface ocean.

Between Saturn and Uranus is the planet Basile. Basile is slightly larger than Titan. It is basically another Titan and rotates every 27 hours. It has a ring system and 3 moons. It's 1st moon is a Shepard moon, while the other 2 moons are around 100 miles in size and evenly spaced further out. Basile because of it's eccentric orbit has seasons because of its orbit, not because of its tilt. It is tilted at 34 degrees, though. When it is closer to the sun along its orbit, it's atmosphere is thicker and has more pressure, but when it is further where it is more cold it is far thinner and it's oceans freeze over. It replaces Chiron. It cuts across the orbits of 3 planets and is a very interesting world. Perhaps life on it's surface adapts to the seasons and freezes along with it's oceans, then thaws out in 'Summer'.

1591388315420.png


Uranus has thicker and more noticeable rings. It has an extra moon named Brunner which is the size of Titania, located further out. Uranus's orbit is slightly closer.

Before Neptune is the outer asteroid belt. A smaller version of the Kuiper belt. Neptune and the Kuiper belt are slightly further out.

Neptune's rings are more noticeable, it's great blue spot is permanent. Triton is joined by another similar moon, Sobel who is twice as far out as Triton. Sobel is very much like Triton but darker in color. Nereid is the same size as Triton and has that notable eccentric orbit.

All of the dwarf planets are the same, moved slightly further out along with Neptune.

Amman is at around 150 AU, is about 2.5x the mass of our Earth. It has a mostly white to yellow surface and no atmosphere since it's so far out from the sun and so cold. It is hard to land on because of that, and it's larger gravity than Earth. It forms a double planet with Gaupelt who are tidally locked, and orbit around each other every 56 days. There are 36 other minor asteroidal moons that orbit further out around the pair of planets. 11 degrees axial tilt, both planets have the same axial tilt.

Accordino is further out at around 300 AU. It's Neptune mass, purple and has rings. It's 3 moons aren't that notable and orbit evenly spaced out. It is extremely dark at this distance. Accordino is tilted at 45 degrees and rotates every 15 hours. It has a massive collection of minor moons due to it's huge gravitational influence.

Further out is Tyche. A T8 brown dwarf star that hosts it's own collection of planets. Tyche is not able to be seen from Earth due to how dim it is at Earth's distance.

The first planet around Tyche is Krause, a Pluto mass world that is very similar to Mercury.

The second planet around Tyche is Sarru, a sub-ice giant at around 5 Earth masses. It's a rather small gasbag.

The third planet is named Schluter, despite being smaller than Mars it hosts a similar atmosphere with enough pressure to allow a single small sea on it's surface.

The fourth planet is named Hatem. Very Lunar like and a bland boring world.

This leads us to Manning. A very Earthlike world with it's 2 minor moons of Calianna and Hanna which are 39 miles wide, and 21 miles in size respectively. It is forever enveloped in the red glow of Tyche and is a 3:2 resonance, meaning for every 3 orbits it rotates 3 times. It has life on it, and is Earth mass. The people that live here resemble the Mayans and Aztecs. Only a few civilizations exist, leaving the planet a vast wilderness and un-tapped. All planets around Tyche are able to viewed from Manning and are seen as gods from the people of Tyche.

Lazore is the fith and final planet around Tyche. It is the same mass of Neptune and hosts some major moons and minor moons. Beyond that is the Tyche asteroid belt. All of these planets are crammed roughly within Mercury's orbit around Tyche and are stable because of resonances. It would be easy to travel between these planets. Tyche's asteroid belt extents to around 3 AU around Tyche.

Further beyond Tyche are the pair of Y Dwarfs named Nemesis and Wormwood.

Nemesis is smaller than Tyche, only burning at around 700 degrees Celcius.

Knoke and Boettcher are the first and second planets. Both are Lunar mass and are rather bland, minuscule worlds.

Lederer is a desert planet with a thick atmosphere. Not like our Venus, you can actually survive here but you would have to have an oxygen tank and climate suitable equipment. You wouldn't need a pressure suit, since it's at around 0.9 atmosphereic pressure.

Nibiru is the habitable world around Nemesis. It is the size of our Earth, tidally locked. Like Manning, it hosts a variety of life forms including intelligent life. They worship Nemesis and the other planets as gods, like the inhabitants of Manning. Their ways of worship are incredibly complex and heretics are often exiled to the ice wastes beyond the terminator zone. Struggling to survive, they often do raids against the inhabitants on the dayward side and talk about the "stars', of which the people of the Dayside can't see because of the red glow of Nemesis.

Russel and Hohn are a binary Pluto like system beyond Nibiru, barely lit up by the dim glow of Nemesis. Beyond them is the Nemesis asteroidal belt that goes out to around 5.5 AU.

Wormwood is even colder than Nemesis. Barely even 'burning' at -37 degrees Celsius. It's planets exist in close to complete darkness.

North Wind is Earthmass, heavily volcanic which is the only source of visible light besides Aurora discharges and lightning in Wormwood's upper atmosphere.

South Wind is Pluto Mass, frozen over and dead.

West Wind is a sub-ice giant much like Sarru. It's purple, however has no moons.

East wind is the final planet, Mars mass and completely frozen over. All of these worlds are tidally locked, and orbit quite close together.

Wormwood has an asteroid belt aswell going to around 1 AU out. Both Nemesis and Wormwood orbit around 30 AU apart and beyond the both of them is an asteroid belt / disc that orbits beyond both of them that is quite large. Wormwood and Nemesis are roughly 10,000 AU out and form a quadruple system with the sun and Tyche.
 
A piece of world building for an ongoing project of mine, where a beleaguered Human polity fights a seemingly endless war against a mysterious alien foe.

 
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